Hydrochloric Acid → HCID 20406152, Verbindung

HRID 2164304Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2164304
Br[C:2]1[CH:7]=[CH:6][C:5]([F:8])=[CH:4][CH:3]=1.[Mg].[CH3:10][C:11]1[O:16][C:15](=[O:17])[C:14]2[CH:18]=[C:19]([CH3:22])[CH:20]=[CH:21][C:13]=2[N:12]=1.Cl>C(OCC)C.C1C=CC=CC=1>[F:8][C:5]1[CH:6]=[CH:7][C:2]([C:15]([C:14]2[CH:18]=[C:19]([CH3:22])[CH:20]=[CH:21][C:13]=2[NH:12][C:11](=[O:16])[CH3:10])=[O:17])=[CH:3][CH:4]=1

Komponenten

7

Edukt 4

HCID 313Hydrochloric AcidHCID 99931-Bromo-4-fluorobenzeneHCID 27965282,6-dimethyl-4H-3,1-benzoxazin-4-oneHCID 5462224Magnesium

Produkt 1

HCID 20406152HCID 20406152, Verbindung

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 241BenzeneLösungsmittelHCID 3283Diethyl EtherLösungsmittel2×

Versuchsvorschrift

A Grignard reagent prepared from 87.5 g (0.5 mole) of p-bromofluorobenzene and excess magnesium in 800 ml of diethyl ether was slowly added to a solution of 2,6-dimethyl-3,1-benzoxazine-4-one in 300 ml of dry benzene and 200 ml of dry diethyl ether at 0° C. The mixture was allowed to warm to room temperature and stirring was continued for 2 hr. The reaction mixture was cooled to -15° C. and 500 ml of 3N hydrochloric acid was added. After about 10 min additional stirring, the organic layer was separated and washed with dilute sodium hydroxide solution. The organic layer was concentrated and the residue was dissolved in a mixture of 600 ml of 95% ethanol and 300 ml of 6N hydrochloric acid. The precipitate (crude titled product) in the amount of 123 g (ca 91%) was recrystallized from cyclohexane to give tan crystals, m.p. 140°-145° C.

Aufarbeitung

  1. temperatureThe reaction mixture was cooled to -15° C.
  2. waitAfter about 10 min additional stirring
  3. customthe organic layer was separated
  4. washwashed with dilute sodium hydroxide solution
  5. concentrationThe organic layer was concentrated
  6. dissolutionthe residue was dissolved in a mixture of 600 ml of 95% ethanol and 300 ml of 6N hydrochloric acid
  7. customThe precipitate (crude titled product) in the amount of 123 g (ca 91%) was recrystallized from cyclohexane
  8. customto give tan crystals, m.p. 140°-145° C.

Quellen und Nachweise

ORD-Eintrag
ord-4282fddac26845a3aec9b860de65f6b3
Quelldatensatz
uspto-grants-1985_03
Patentnummer
US04503073

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